Apparatus for coating sheet, plate, and rolled metal.



L. S- STODDAR D & B. GOLDSMITH. APPARATUS FOR COATING SHEET, PLATE, AND ROLLED METAL.

' APPLICATION FILEQ'IULY 2|.1914.

1,142,856, PatentedJune 15 1915.

2 SHEETS-SHEET I.

FIG.1

WITNESSES MENTOR I AM /4 L. S. STODDARD & B. GOLDSMITH.

APPARATUS FOR COATING SHEET, PLATE, AND ROLLED METAL APPLICATION FILED'JULY 21. 1914.

I 2 SHEETS-SHEET 2.

FIG. 4

WiliESSES I i INVENTOR I W 9i w Q7 M i g l LEWIS S. STODDARD AND BERTHOLD GOLDSMITH, 0F LISBON, OHIO.

APPARATUS FOR COATING SHEET, PLATE, AND ROLLED METAL.

Specification of Letters Patent.

Patented June 15, 1915.

Application filed July 21, 1914. Serial No. 852,277.

Sheet, late, and Rolled Metal, of which the following is a specification.

' This invention relates to apparatus for coating roll, sheet and plate metals or alloys, with a coating of metals or alloys, and more particularly to apparatus for coating such' metals or alloys on one surface only.

7 The object of the invention is to provide for this purpose an apparatus of simple construction, whereby roll, sheet or plate metals or alloys can be rapidly and thoroughlycoated with asubstantially uniform layer of the coating metalsor alloys, and whereby the coating material is prevented from being deposited on the edges and the opposite surface of the metals or alloys being coated,- and also prevented from being .wasted through excessive oxidation and otherwise.

The invention comprises the construction and arrangement of apparatus hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a plan view of the apparatus; Fig. 2 is a side elevation of the same; Fig. 3 is a vertical cross section thereof on the line 3-3,

Fig. 2; Fig. 4 is a vertical longitudinal section on the line 4-4, Fig. 1 through the melting and depositing or distributing tank or pot; and Fig. 5 is a detail view of an edge wiper.

In the drawings, 1 illustrates a suitable frame of any adaptable construction or material upon which the operating parts are mounted. Mounted on one end of this table or frame are one or more suitable spools or drums 2 upon which is placed a coil or roll of the metal to be coated, when roll metal is used.

3 represents a fluxing pan or tank, referably a lead pan, for containing the uxing material, such as chlorid of zinc. Mounted in frame 1. to revolve under pan .3 is a fluxing roll 4, this preferably being covered with cotton, or other suitable soft material for depositing flux on'the upper side of the roll, sheet or plate, the latter being represented by the line. 5. The fluxing pan or tank 3 is provided in its bottom with suitable perforations through which the fluxing material drips and is carried by the roll 4 and deposited on the upper surface of the metal 5 passing under roll 4:. The sheet or plate 5 1s held in contact with said fluxing rolls by means oftwo idler rolls 6, one on each side of the roll 4 and over which the sheet or roll passes. By this arrangement the upper surface of the plate, sheet or roll metal or alloy 1s thoroughly fluxed. The plate, sheet or roll metal then passes underneath one or more distributing. and absorbing pads 7 which preferably are constructed of wood or metal covered with a fibrous substance, such as cotton cloth. These pads distribute flux evenly over the upper surface of the plate, sheet or roll metal, and also absorb any surplus fluxwhich may have been deposited thereon by the fluxing roll. Preferably, the fluxing roll 4 is rotated by its frictional contact with the plate, sheet or roll metal passing thereunder,

but if desired it can be positively driven,

such as by meansof a suitable sprocket chain, belt or the like 8 connecting a wheel 9 on the'end of said roller shaft with a similar Wheel or pulley 10 on a suitable driving shaft 11. The sheet then passes under' a depositing or distributing 'pot or tank 12 containing the molten coating metal or alloy. The pot or tank 12 is supplied with the moltencoating metal or alloy from a suitable melting pot or tank 13-which may be heated in any suitable way, such as by means of a gas or or oil burner, or by setting the same into a suitable stove or furnace 14, as shown, in which a fire of any character is maintained, in order to keep the coating metal or alloy in a suitable fluid condition. The molten metal or alloy is transferred from the melting pot or tank 13 to the deposit-ing or distributing pot or tank 12 by means of two vertical reciprocating plunger lifters, each of which comprise a suitable tube 15 dipping down into the tank 13 and in which reciprocates a suitable valved head 16 which may be of any pump head construction capable when the head. is depressed of allowing molten metal or alloy to pass through said head, andwhen said head is lifted to close and lift the molten metal which has passed therethrough, and be lifted thereby and discharged through an opening 17 in the tube or barrel 15 into the depositing or distributing tank 12. The lifting heads 16 are alternately reciprocated vertically by any suitable means, that shown comprising rods 18 connected to said heads and being jointed to straps 19 operating upon eccentrics or cams 20 secured to the driving shafts 11.

By having two plunger lifts, one on each side of the apparatus, a steady supply'of molten metal or alloy is supplied to the depositing and distributing tank 12. The latter is sealed tight by a suitable cover, but is provided in its bottom 21 with a slot or opening 22 through which the molten metal or alloy is discharged upon the upper surface of the sheet or roll of metal passing underneath the tank or pot.. This slot is preferably controlled by means of a suitable valve, which may be of various constructions, and which is shown as a Wedge shaped bar 23 provided at its ends with swiveled connections to threaded rods 24 projecting from the end of the tank 12 and which rods are provided with suitable rotating members, such as the handles 25.

Beyond the distributing or depositing tank 12, along the path of movement of the sheet are one or more stripping devices, such as brushes or the rods 26 shown, which are so located as to drag against the upper surface of the sheet of metal passing thereunder,

and which serve to distribute the coating metal or alloy over the sheet or plate and also remove a considerable portion of the surplus coating metal or alloy, which removed portion drops backinto the melting pot or tank 13. passes underneath and in contact with one or more rotary wipers or brushes 27 two such brushes being shown. lhese are in the form of rolls and are covered by a suitable yielding wiping material, preferably tow, although the covering may be ofother fibrous material. The sheet or plate is held in contact with t ese wiping brushes by means of idler rolls 28, three such rolls being shown mounted in'the frame 1 and bearing against the under surface of the sheet or plate. The brushes 27 are positively rotated in the direction of the arrows 29, that is, in a direction contrary to the direction of travel of the sheet or plate, and therefore serve to wipe ofl' the surplus coating material and finish the upper coated-surface of the sheet or plate. These rolls may be rotated by any suitable mechanism, such as by being connected together by the sprocket chain, belt or similar driving member 30 so as to rotate in unison, and one thereof being driven by means of a suitable sprocket chain, belt or the like 31 from the driving shaft 11.

In conjunction with each of the wiping rolls is provided a scraper and guard, in the form of acurved plate 33 attached to the frame or table 1, and having a troughshaped scraping edge 34 serving to scrape from the wiping rolls any coating material which may adhere thereto and conduct itto The sheet or plate then the same to the shaft of one of the wiping rolls. The rolls 39 are preferably formed of wood covered with a suitable textile material, such as canton fiannel or the like, and bear against the edges of the sheet or plate 5 and wipe off any coating material which may have run onto the same.

An suitable mechanism may be used for drawing the roll, sheet or plate metal through the apparatus described. As illustrated, this is effected by means of a spool or drum '35 rotatably mounted in suitable bearings on the table or frame 1, and upon which the plate, sheet or roll metal is wound,and which spool or drum can be driven in any suitable way, such for instance as by means of the sprocket chain, belt or similar member 36 connecting said spool or drum 35 with one of the wiping rolls 27 the latter being driven, as before stated, from the driving shaft 10. The driving mechanism for the various rolls on the spool or drum may be arranged in any desired or preferred way, and the particular arrangement shown in the drawings is merely one arrangement suitable for this purpose. Power can be supplied to the driving shaft 10 from any suitable source, such as by means of a belt 38 coming from any power shaft and running over fast and loose pulleys 39 on the driving shaft 10. The driving mechanism is arranged to rotate the various rolls in the directions indicated by the arrows and at the necessary speeds.

The apparatus described is of simple construction and is so arranged as to quickly, thoroughly and uniformly coat the plate, sheet or roll metal. Surplus coating material is scraped and wiped off so as to give a practically uniform coating, and the edges and under surface of the sheet or plate metal are kept reasonably clean from the coating metal. The operation of the apparatus described will be readily understood from the foregoing description.

What we claim is:

-- 1. Apparatus for coating plate, sheet or rolled metal, comprising a melting pot or tank for the coating metal or alloy, a depositing and distributing pot or tank located above the course of the sheet or plate to be coated, and means for lifting the molten coatingmaterial from the melting pot or tank to the depositing and distributing pot or tank.

2. Apparatus for coating plate, sheet or cated above the course of the sheet or plate a to be coated, a pair of reciprocating plunger lifts for transferring the coating material from the melting pot or tank to the depositing pot or tank, and means for actuating said reciprocating lifts alternately.

4:- Apparatus for coating plate, sheet or rolled metal or alloys, comprising a distributing 0r depositin pot or tank provided in its bottom with a valve controlled discharge orifice, means for drawing the metal to be coated underneath said pot or tank, in combination with fluxing means and wiping means.

5. Apparatusfor coating plate, sheet or rolled metal or alloys, comprising a sealed distributing or depositing tank provided in its bottom with a discharge opening, means for supplying molten coating material to said pot or tank, means for drawing the metal to be coated underneath said pot or tank, in combination with fluxing means in advance of said pot or tank, and wiping means in the rear of said pot or tank.

6. Apparatus for coating rolled, sheet or plate metal or alloys, comprising a distributing and depositing pot or tank arranged to discharge the coating material on the upper surface of the sheet or plate, means for drawing said sheet or plate underneath said pot'or tank, scraping and wiping means to the rear of said pot or tank arranged to contact with the upper surface of the coated sheet or plate, and wipers engaging the edges of said sheet or plate.

7 Apparatus for coating rolled, sheet or I plate metal or alloys, comprising a distributing and depositing pot or tank arranged to discharge the coating material on the upper surface of the sheet or plate, means for drawing said sheet or plate underneath said pot or tank, scraping and wiping means to the rear of said pot or tank arranged to contact with the upper surface of the coated sheet or plate, and Wiping rolls engaging the edges of said'sheet or plate.

In testimony whereof, we have hereunto set our hands.

. LEWIS S. STODDARD.

BERTHOLD GOLDSMITH. Witnesses:

- R. GOLDSMITH,

D. R. PRITCHARD. 

